NEW YORK (AP) -Former NBA referee Tim Donaghy bet on about 14 games he officiated in the 2006-07 season, Assistant U.S. Attorney Jeffrey Goldberg said in a letter filed Friday in Brooklyn Federal Court.

``In the Spring of 2003, Donaghy provided picks for games he refereed on only 2-3 occasions,'' Goldberg wrote. ``Over the next three full seasons (2003-2004, 2004-2005, and 2005-2006), however, Donaghy bet on numerous games that he worked.

``The government's investigation revealed that Donaghy provided picks for anywhere from 30 to 40 such games for each of those three seasons. During the 2006-2007 season (the time period charged in the information), Donaghy bet on approximately 30 games, including about 14 games that he refereed.''

Donaghy pleaded guilty last year to charges he conspired to engage in wire fraud and transmitted betting information through interstate commerce. The referee said he made NBA bets for four years, even wagering on games he worked. He also admitted recommending bets to high-stakes gamblers and collecting $5,000 if his picks hit.

Donaghy is scheduled to be sentenced May 22. By law, he faces up to 25 years in prison, though the term could be much lower under sentencing guidelines.Copyright © 2005 The Associated Press. All rights reserved. The information contained in the AP News report may not be published, broadcast, rewritten or redistributed without the prior written authority of The Associated Press.